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http://dx.doi.org/10.7314/APJCP.2014.15.6.2647

Pretreatment Neutrophil/Lymphocyte Ratio as a Prognostic Aid in Colorectal Cancer  

Ozdemir, Yavuz (Department of Surgery, Gulhane Military Medical Academy, Haydarpasa Teaching Hospital)
Akin, Mehmet Levhi (Department of Surgery, Gulhane Military Medical Academy, Haydarpasa Teaching Hospital)
Sucullu, Ilker (Department of Surgery, Gulhane Military Medical Academy, Haydarpasa Teaching Hospital)
Balta, Ahmet Ziya (Department of Surgery, Gulhane Military Medical Academy, Haydarpasa Teaching Hospital)
Yucel, Ergun (Department of Surgery, Gulhane Military Medical Academy, Haydarpasa Teaching Hospital)
Publication Information
Asian Pacific Journal of Cancer Prevention / v.15, no.6, 2014 , pp. 2647-2650 More about this Journal
Abstract
Background: Colorectal cancers(CRC) are the third most common cancer in the western world, with surgery preferred for management of non-metastatic disease and post surgical treatment usually arranged according to the TNM staging system. However, there is still prognostic variation between patients who have the same stage. It is increasingly recognized that variations within disease course and clinical outcome in colorectal cancer patients are influenced by not only oncological characteristics of the tumor itself but also host response factors. Recent studies have shown correlation between the inflammatory response and clinical outcomes in various cancers. The neutrophil/lymphocyte ratio (NLR) has been described as a marker for immune response to various stimuli including cancer. Material-Methods: Two hundred eighty-one CRC patients were included in our retrospective analysis, separated into two groups according to a cut-off value for the NLR. Patient data including age, gender, vertical penetration, anatomic location, and differentiation of the tumor, TNM stage, survival rate, and disease-free survival were analyzed for correlations with the NLR. Results: Using ROC curve analysis, we determined a cut-off value of 2.2 for NLR to be best to discriminate between patient survival in the whole group. In univariate analysis, high pretreatment NLR (p=0.001, 95%CI 1.483-4.846), pathologic nodal stage (p<0.001, 95%CI 1.082-3.289) and advanced pathologic TNM stage (p<0.001, 95%CI 1.462-4.213) were predictive of shorter survival. In multivariate analysis, advanced pathologic TNM stage (p=0.001, 95%CI 1.303-26.542) and high pretreatment NLR (p=0.005, 95%CI 1.713-6.378) remained independently associated with poor survival. Conclusions: High pre-treatment NLR is a significant independent predictor of shorter survival in patients with colorectal cancer. This parameter is a simple, easily accessible laboratory value for identifying patients with poorer prognosis.
Keywords
Colorectal cancer; inflammatory response; neutrophil/lymphocyte ratio; prognosis;
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